CVE-2020-6470 Cross-site scripting in Chrome

What is CVE-2020-6470?

CVE-2020-6470 is a medium-severity cross-site scripting vulnerability in Debian Debian Linux, published on 21 May 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Insufficient validation of untrusted input in clipboard in Google Chrome prior to 83.0.4103.61 allowed a local attacker to inject arbitrary scripts or HTML (UXSS) via crafted clipboard contents.

Weakness: CWE-79

Which versions are affected by CVE-2020-6470?

It affects 5 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Google Chrome, Opensuse Backports Sle, Opensuse Leap.

How do I fix CVE-2020-6470?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-6470 being exploited?

There is no known exploitation of CVE-2020-6470 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-6470, GHSA-m56m-jfmr-w52g, UBUNTU-CVE-2020-6470.